Tractor



May 15, 1923.

G. W. DUNHAM TRACTOR 1920 5 Sheets-Sheet l Filed dan. 50

May 15, 1923.

Filed dan. 30 1920 5 Sheets-Sheet 2 May 15, 1923.

G. W. DUNHAM TRACTOR 5 Sheets-Sheet 3 May 15, 1923. 1,455,394

G. W. DUNHAM TRACTOR Filed dan. 30. 1920 5 SheetS-Sheet 4 Syvum/VWO@ Gaye 74/7 Jrnam 4 M/m/gmj May 15, 1923.

G. W. DUNHAM TRACTOR 1920 5 Sheets-Sheet 5 Filed Jan. 50.

` front Patented May 15, 1923.

UNITE.

stares dnonen W. nennen, 'onNnW YORK, N. Y., AssIGNoR frol GnanAMnnoirHnss, or

EvANsvILLn, INDIANA; .A CORPORATION or INDIANA.

TRACTOR.

Application filed .Tanuary 30,` le20, serial No; '355,155.`

vThe invention relates to tractors and re fers moreI particularly to that type havingrear Wheels and frontsteering` Wheels. Une of the objects of the invention is the pro vision of means for faoiliftatingthe turning of the tractor. [Another object is to provide an arrangement in which the power take-off mechanism can be' graduallyl 'operativelyA connected to the engine; A further Objectis the provision of a starting crank for the engine atxthe rear Aof the tractor andy adja.

cent to the `engine clutch control pedal. whereby one person would be able to release the engine yclutch .and 'rotate `the ystartiifigg crank to the desired position preliminary `to cranking` the engine. A still further object is the provision of a short drivevvheel stub shaft having/but oneinner bearingin the tractor frame. .Other objects of the lnvention reside in theA novel arrangements vand comliiinations of parts as morefullv rhereinafter set forth. .n V j Y ln the drawings: n y i f l `igure l is a vertical .sectional view through a portion of a tractor embodyingv mv invention; l

Figure Qis a topplan view of the transmission housing;` f

Figure 8, is a side elevation g., i

Figure l-f is a ,horizontalsectional view through a .portion of thetransmission hous-y ns: f i i Figure 5 is a central vertical sect-ion therethrough;

Figure (5 is a Sectional elevation of a poi'- n tion ofthe rear axle. f i, p n

l is the engine, and the transmission housinggsecured tothe engine housing and forming` a nnit construction offrame. 3 are side sills of a Subffraine,entending. from the .e rearward ofthe rear axle vand formingrthe lreach connectio'nA between the axles'. @he rear axle comprises the aligned stub shafts 4luponethe outer ends fwhich are mounted the drive ivheels 5.

6 isthe main drive shaft adapted to be `operatively connected to the engine l by means of the clutch 7. This main drive shaft is forme-d of a plurality of sections 8, 9 and'lO. the sections S and 9 being mounted in suitable bearings in cross partitions of the housing 2 While the section l() is intermediate the sections 8 and 9 and non-rotatabl57 secured thereto as by means of the sleeves l1 surrounding` the adjacent ends of the sections 8 and 10 and 9 and 10, and preferably splined thereto. Suitable transmis ysion or change-speed gears 1Q and. 18 are provided x'ediy mounted upon the section S and other transmission or change-'speed gears 14 and4 15 are provided slidably mounted vnpon the counter shaft 1G and preferably splinedvthereto. the gears ltand 15 being ,preferably integral and forming the annular groove i7 therebetween, which is engaged in by the fork 18 upon. the geen. shifter rod 19 longitudinali)7 slid ablymounted in the housing' 2. 2O is a gear shifter lei/er for actuating` the rod 19, the latter havingthe series of notchesQl adapted for eng` gement with the spring pressed detent memberQQ to hold the rod in its adjusted position; The counter shaft 16 has fixedly secured, at its inner end thebevel pinion 23 Which meshes with the y'bevel gear .Wheel 24 of the differential Igearing` 25. The transmission or changespeed gear-ing: is located between the inner ends of the stub shafts 1l.

This differential gearing' is mounted'upon the inner ends of the jack shafts i265l which are mounted in the honsin-giv 2 forward of the stnbl shafts il. Pinions 2T non-rotatably mounted upon the jack? shafts mesh with' the gear Wheels 28 non-rotatably mounted upon theinner ends of the stub shaftsieaeh of which engages an inner,bearing/E29 in the housinga 2 outside and adjacent to the (Year wheel and an outer bearing QS" in the yo v ter end ofthe housing extensionfll bolted to the side of the housing' 2'. rang'einentlthe number of parts Well as the `weight of the vtractor is decreased and furtl'iermore clearanceis provided between section of `the transmission housing.r` This. housing section 3@ carries the power take off' mechanism which. comprises a suitable wheel or pulley 3l at the ide ot the housing section 3() and mounted upon the shaft 32. the inner end ott which is secured to the bevel gear wheel 33 supported inside the housing section and meshingwith the bevel pinion 84 rotatably mounted upon the section 9 of the main drive shaft. rlhe pinion 34 is provided with the jaw clutch teeth 35 which are adapted to engage the jaw clutch teeth 3G upon the collar 37, slidahly sglined upon the section 9 and adapted to beV .moved into engagement with. the pinion by means ot the vforked rod. 35% depending; into the housing 2 and mounted upon the rod 39 which lon'iitiuliuallv slidably engages .inv the bearinf a 40 and ll upon the transmission housinfr respectively at the liront and rear ends er the rod. The bearing); lll contains the spring pressed detent member i2 tor engaging; in the notches 43 in the rod 59 'tor holding` the latter in either of its adjusted positions. lith this arrangement` the power take-ott1 mechanism can be positively connected to the main drive shaft when the latter is stationary, due to the i'i'act that the operator can release the engine clutch. lllhen the engine clutch can be gradually engaged to drive the power-takeoit mechanism, .iereby avoiding' shock due to sudden impact.

For the purpose of facilitating' in the steering of the tractor, (the trent wheels beino steered hv the usual hand wheel l have provided brakes which. are located at the outer ends of the j ack shafts and which ca be alternatively applied. As shown` las and 45 are brake wheels or drums non-rotatably mounted on the outer ends ot the jack shaft-s 26. and 46 and 47 are brake bands adapted to be clamped respectively upon these drums. F or actuating' these brake bands the toot pedals 48 and 49 are provided pivote-,d at the rearof the housing' 2 and suit-ably connected to their respective bra-ke bands. These toot pedals have depending arms 50 and the depending; arm of the foot pedal Ll-S is pivotally connected to the link 5l the forward end ot which is pivotally connected to vthe lever 52 pivoted intermediate its ends tor tightening; the brake band 46 upon its brake drum. The depending*4 arm ot' the toot pedal i9 is pivot ally connected to the link 555i the `forward end ot which is pivotally connected to the rock arm Sil having its lower end non-rotatably 'secured to the rod 55 extending` transversely beneath the housing;` 2. The opposite end of this rod 55 has the rock arm 56 pivotally connected to the link 57 extending forward and pivotally connected at its forward end to the lever 58 for actuating the brake hand 4:7.

59 is another toot pedal pivotally mounted at the rear ot the housing 2 and adjacent to the toot pedals 48 and 49. thisvtoot pedal 5f) being adapted to release the engine clutchY 7. rlhis foot pedal has a. depending arm similar to the other foot pedals, which is pivotally connected to the link 60 secured at its forward end to the rock arm 6l, which is in turn secured to the sleeve G2, surrounding the rod 55 and extending transversely beneath the tractor. vThe opposite end ot the sleeve has the rock arm 63 which is counected to the link 64 which is non-rotatably secured to the shaft 66 upon which is mounted the yoke 67 for releasing the clutch.

ln turning the tractor to the right or lett, the turning movement is facilitated by respectively actuating the toot 'ieda-ls 48 or Q29 to apply their respective brake bands which trictionally reduce the power applied t-o the drive wheels upon their respective sides ot the tractor thereby allowing of greater movement of the other drive wheel, which is possible due to the differential gearing. This arrangement has a further advantage in that under certain conditions where one or the other drive wheel loses traction from any cause, it can be either partly or completely prevented from turning' by depressing the toot pedal to actuate the brake on the same side of the tractor as the drive wheel, whereby the other drive wheel having traction will drive the tractor.

Another important consideration is that the application of the brakes provides a more minute and steady steering adjustment than the hand wheel. It' the tractor deviates 'from its course and the hand wheel is actuated to bring; the same back to its correct position, there is great liability that the front wheels will swerve too tar in the opposite direction and thus produce a lateral reciprocating movement in a forward direction. By applying the correct brake the turning movement of the tractor will be steady and the operator can readily bring the tractor back to its original direct-ion.

68 is a starting crank for the engine. this starting' crank being located at the rear of the tractor and being adapted to be opera.- tively connected to the rea-r end ot the main drive shaft 6. This starting crank is located. acent to the .toot pedal so that if.' it is not in the desired angular relation when .its ratchet teeth are in enxv .nement with those on the main drive shaft 1t may be readily rotated hy depressing the lioot pedal 59 to release the clutch 7 when the `foot pedal 59 may be released to permit ot engagement ot' the clutch`r so that upon further turningof the starting crank the engine will also be rotated to start the same. It will be readily seen that the constructionis such that one person may operate the starting crank and the engine clutch pedal at the same time so that only the main drive shattwill be turned. Furthermore, ice the gear shifter lever and the power taire-ott mechanism control lever are at the to the desired position.

rear oit the machine they may be readily placed in neutral before turning the starting crank.

69 is aplati'oim secured upon the side sills i 3 to the rear of they rear axle vand below thefoot pedals, and70 is a suitable draw bar also secured` to the' side sills by means kof the cross bar 71k and rpin 7 i .c

For the-purpose of .providing'ready accessibility of they parts' the rear section ol the transmission housing' 2 is formedof complementary upper and lowerportions 73 vand 74 respectively, having their meeting edges inV the planes of the axes of the stub shafts. t, the jack shafts 26 and the counter shaft `16. The upper portion 73 hastheapertuije or hand hole 75 normally covered by the cover.

plate 76. By removingi this cover plate the )securing` means 7 '7, such as a screw, for the` forward sleeve l1. surrounding the adjacent ends of the front andintermediate sections ot the main drive shaft may be removed and; this sl'eeve slid back over the intermediatevsection toclear the rear end of the front sec! tion when the upper portion 78 ot they hous ing may be detached, after having removed the means securing' this portion to the lower portion and the housing section vThe Vchange-speed gears, thedierential gearing and other parts enclosed within the rear section of the housing can now be-easilyfin spected, andif necessary,frenioved and replaced. n ln order to provideready accessibilityto' the lparts enclosed within the housing` section 3() the containers' 78 for the anti-friction bearing` 79 near the rear end otthefront section 9 of the main drive shaft is remov# ably secured inthe rear cross-partition ot the housing section, ras by means ot the capY bolts 80. The anti-friction bearing has the outer and inner race members 8l and82, respectively, between which'4 are located the balls 83. The outer raceinember is secured in the bearing container 7 by means' of the outer nut 84; threadeglly engaging the rear' end portion ot the container, while ythe inner race member 82 is retained in placeby means of the inner nut 85 engaging; the rear end of the inner race meinberand threadedly ward end extending,l over the forward end' of the outer racenieinberl.

For the purpose of preventing binding;foi'V the beve-lled pinion 34., the rportion oit the front section 9 of the inaiii drive sha-tt upon portion andthe inner race member.

' tioned rear shoulder and washer.

which tlie bushing` 87 for the bevelled pinion is mounted is of slightly greater' diameter 'than the portion engaged by the inner race member 82, and the washer 88 is provided between the rear shoulder ot this enlarged This arrangement prevents bindingof the bevelled pinion 34s, since the forward movement of the anti-friction bearing` relative to the bevelled pinion is limited by the above-inenilter the bearing container has been removed the bevelled pinion 311- may also be removed by sliding the same back over the tront section 9. The collar 37 may bek also removed in the same manner, the internal diameter of the splines of this collar being" such that this is possible.

i `What I claim as my invention is: The combination with` an engine, of drive wheels, transmission connected to said drive wheels, a clutch for operatively connecting said engine `to said transmission, means for operating' said clutch,ppower takeyoli'.'mechanism adapted to be driven from said transmission, a clutch for operatively ,connecting said power take-oil to said transmission, and a starting crank forsaid engine at the rear ofsaid transmission and at the side of said clutch operating means.

2. In a tractor, the combination with a frame, of a stub shat't mounted in said frame, a drive wheel non-rotatably mounted upon theouter end of said stub shaft and a. ,ojear wheel non-rotatably mounted on the inner end ot said stub shaft, the bearing por'- .y tion of said stub shaft upon said frame be-v ing outside said gear wheel.

3. In a tractor, the combination with an 'engine and a transmission adapted to be operatively connectedto said engine, said. transmission including a counter shaft and a main drive shaft comprising; a-plurality of sectionsv and a sleeve non-rotatably securing' adjacent ends of said sections jto reach other, of a 4transmission housing'` *having* `complementary `upper and lower portions with their meeting` edges in the plane of the 'axis of said counter shaft, one of said por tions provided with means for permitting of disengagement of said sleeve 'r'ioin ,one oit lsaid sections.

n In a tractor, ythe combination with au engine transmission adapted to be operatively connected to said engine, said transmission includingi a counter shaft, a` main drive shaft comprising rear,interinediate and front sections, sleevesv surrounding,r adjacent ends of said sections and non-rotatably securing the saine to each other, and

means for firedly securing; each of said` sleeves to one shaft section, and jack shafts adapted tobe driven Afrom said counter shaft. o t la transmission. lhousingl havingv complementary upper and lower portions iio iso

loeai'ing container surrounding; said drive Iii Yvided with complementary upper and loiver portions, of a drive shaft comprising' a 'iront shait and i'eiiiovably secured to said partition, an :u Y"riction b ring mounted in said container and removable therewith as a unit, said bearing' comprising inner and outer race members and anti-triction members therebetween, :ind a nut engrazejeable with said inner rare. member and thi'eadedly engaging' drive shat't.

6. ln a tractor, the combination with in engine and a transmission housing' oriiiuig a unit construction, said 't 1ansinission housing' comprising a iront section'. provided with cross partition and a rear section presection mounted in said ii'oiit housinof section ann an aligned section in rear et' said liront section, and mounted` in said upper housing; portion a sleeve suri'oundineV adjacent ends said shaft sections and nonrotatably securing the same to each other, mecl'ianisin on said front shait section forward ott said cross partition, means in said upper housing' portion for permitting oi" slis'linp; said sleeve olif said iront shaft seetion, whereby said upper housing' portion can be reinoif'eo, a bearings; container surrounding' said front shaft section and removably secured to said cross partition and an antifviriction bearing mounted in said coi'itainer and removable therewith as a unit, the outer diameter of said bearing; .container being' such that said mechanism on .1. .ff J. JU. .L 1 PC' 1 sain iront shan.Y section may be slid ori said trout shaft section when said bearing' container is removed.

T. The .combination With a housin; havinn' a cross partition, of a drive shaft eX- tendingr through said partition, a gear, mounted on said shaft inside said housing', an anti--iti'iction hearing; for saiu shaft movably mounted in said partition, and means ''oi' limiting; the invi'ard movement of said bearing' relative to saidr shaif't to prevent binding' oit said gear.

S. The combination Wit-h a housing having' a cross partition, ot a drive shaft eX- tendine' through said partition, an enlargement on said shaft inside said housing, a eearmounted on said enlargement, an antifriction bearii'ig'iior said shaft mounted in said partition, and a bearing between said bearii'ig` and enlargement and adapted to he engaged by said gear.

tively connected to connecting' said shaft to said engine, a pedalv 'for actuatingr said clutch, and a starting' cranl; for said engine adapted to be operasaid shaft at the end opposite to said clutch, said starting crank being at the side of said clutch actuating; pedal.

l0. rEhe combination With an engine and a transmission adapted to be operatively connected to said engine, said transmission including' parallel shafts one of which comprises plurality of sections, and means tor non-rotatably securing adjacent ends ot said sections to each other, oit a transmission housing; having a removable part carrying' said sectional shaft, said housing being provided with means for permittingot' disengagement of said means for non-rotatably securingA said shaft sections to each other.

ll. The combination with an engine and a transmission adapted to be operatively connected to said engine, said transmission incliidingJ parallel shafts, one of which comprises a plurality of sec-tions, and means for non-rotatably securing' adjacent ends of said sections to each other, of a tivo-part transmission housinp; having the meeting edges oi' its parts substantially in the plane. oit the airis of said shaft arallel to said sectionalv shaft, said transmission being' provided with means for permit-ting of disengagement oi' said means for securing' said shaft sections to eachother.

l2. rEhe combination with a housing' having' a cross partition with an aperture there through, of a drive shaft extending through said aperture, a mechanism longitudinally slidably mounted upon said drive shalt at oneside ol' said partition and adapted to pass through said aperture, and a bearing; for said drive shaft removably mounted upon said partition.

13. The combination with an engine, of transmission gearing', a clutch for operatively connecting said engine to said ti'ansmission gearing', means for operating' said clutch, and a startingy crank for said en- Keine atthe rear of said transmission gearing and at the side of said clutch operating means.

14. The combination with au engine, ol transmission `gearing', drive wheels operatively connected to said gearing', a clutch for operatively connecting' said gearing' to said engine, a member' at the rear of said gearing' for actuating said clutch, and a starting crank for said engine adapted to be operatively connected thereto through said: gearing and clutch, said starting' crank being at the rear of said ,gearing and at the side ot said clutch actuating' member.

In testimony whereof l affix my signature.

., ,Geenen W. nonnina. 

